Slubber bobbin



J. B. HAWLEY SLUBBER BOBBIN Jan. 22, 1963 Filed Nov. 13, 1959 INVENTOR ATTORNEY United States Patent 3,074,666 SLUBBER BOBBEN John B. Hawley, Greensboro, N.C., assignor to Akron Spool and Manufacturing 60., High Point, NAIL, a corporation of North Carolina Fiied Nov. 13, 1959, @er. No. $52,697 1 Claim. (Ci. 242-1186) This invention relates to flanged roving or slubber bobbins and relates more particularly to slubber bobbins formed from roving or slubber headless bobbins to increase the yarn receiving capacity thereof.

Presently headless bobbins, pirns and spools used on flyer or twister frames have rather limited yarn capacities due primarily to the manner in which the terminal ends of the wound yarn package convergesto the terminal ends of the yarn supporting devices or bobbins. Winding or twisting the roving on the package so as to avoid the tapering or converging ends without providing flanges on the spool inevitably results in packages which will have collapsed terminal portions of yarn. These collapsed end portions of the yarn package will result even after a minimum of handling particularly when the package is eing doffed, thereby requiring rewinding or removal of a substantial length of yarn with increased knots and ends down. Increasing the capacity of the yarn package without making substantial modifications to the flyer or twister equipment has not proven satisfactory. Also, providing flanged bobbins on conventional equipment has not proven satisfactory due to the problem of handling and doffing the full yarn package.

Therefore, this invention contemplate-s providing a modified bobbin to support a substantial yarn capacity increase in the bobbin without substantially modifying conventional yarn processing equipment.

Another object of this invention is the provision of a yarn packaging device formed by modifying or rebuilding conventional headless roving bobbins by incorporating selectively spaced flanges that are mounted on the bobbin barrel permitting increase-d yarn capacity longitudinally and circumferentially thereby increasing the net yarn capacity.

A further objective of this invention is the provision of a modified yarn pirn in which the basic unit is modified to accommodate a first flange slidably mounted intermediate the longitudinal length of the barrel and locked in position thereon and a second flange mounted at the opposite end of the barrel from the driving end of the bobbin.

Still another object of this invention is to provide an increased yarn package bobbin in which axially spaced flanges are supported on a modified headless bobbin with at least one of the flanges being slidably mounted on the cylindrical barrel and locked in position.

Further objects of this invention are to utilize existing roving bobbins for increasing the yarn receiving capacity thereof by incorporating flanges at axially spaced intervals at a minimum of cost to produce a bobbin having increased wear life, and one in which the yarn convolutions may be supported adjacent to the terminal ends thereof.

Other objects and many of the attendant advantages of this invention will become more readily apparent to one skilled in this art from the following detailed description taken in conjunction with the accompanying drawing in which like characters of reference designate corresponding parts throughout the several views, and wherein:

FIG. 1 is a partial longitudinal view, partially in section, with an intermediate portion removed illustrating a conventional slubber bobbin;

3,074,656 Patented Jan. 22, 1963 "ice FIG. 2 is a right end elevational view of the bobbin of FIG. 1;

FIG. 3 is a side elevational view of the bobbin of FIG. 1 as modified by mounting axially spaced flanges thereon;

FIG. 4 is a left end view of the flanged bobbin of FIG. 3, with a portion of the right flange removed;

FIG. 5 is an enlarged partial longitudinal view of the bobbin of FIG. 3, with an intermediate portion removed, and illustrating portions in section removed therefrom, and a portion of one flange removed; and

FIG. 6 is a partial longitudinal view of a bobbin illustrating one modification with an intermediate portion removed and other portions illustrated in section.

Referring to the drawing and particularly to FIGS. 1 and 2, there is illustrated a conventional headless slubber or roving bobbin 10, conventionally made of wood, in which a longitudinally extending cylindrical barrel 11 receives the roving or yarn convolutions thereon, and an enlarged terminal driving head portion 12 in which the terminal base 13 has circumferentially spaced and radially extending recesses 14 to receive the bobbin driving or re taining elements (not shown). A circumferential reinforcing split ring 1 is recessed within the groove 16 intermediate the length of the enlarged head portion 12. A spindle-receiving bore 16 extends axially through the bobbin with the upper end portion 17 of the bore being tapered to converge inwardly thereby providing a bearing element or guide for a spindle (not shown) on which the bobbin may be supported in the vertical position.

It has been characteristic to utilize headless roving or slubber bobbins on roving and twister frames with the ace mpanying disadvantages of limited yarn capacity due primarily to the reduction in diameter and the converging end portions on the yarn package. For example, a conventional yarn package formed on a headless bobbin twelve inches long and supporting a .55 roving developed or wound to a diameter of six inches will have a net yarn weight of sixty ounces. In contrast, by utilizing the present invention, the twelve inch spool will support a yarn diameter utilizing a .55 roving of seven inches and the terminal ends of the package will be substantially cylindrical with the central portion of the package thereby resulting in a total yarn capacity of approximately ninetyfour ounces or greater. This increase of 50% or greater results in increased economy of operation with fewer number of doflings during operation and less knots and ends down. In some instances, the increased yarn capacity has amounted to approximately 200% over the conventional capacity for a specific size bobbin.

To achieve this desired result, the conventional slubber bobbin 1!) as shown in FIGS. 1 and 2 may be modified to form the flanged bobbin 21 of FIGS. 3, 4 and 5 in which the barrel 20 is preferably turned-down to provide an abutting shoulder 22 at the enlarged head portion 23 against which a hard fibreboard circular flange or disk 2d is mounted after slidably passing over the barrel. The flange 24 is secured to the barrel 2!) and to the shoulder 22 by suitable adhesive means 25, or by other suitable fastening means. The enlarged head portion 23 of the bobbin has circumferentially spaced and radially extending recesses 26 therein simi ar to those shown in FIGS. 1 and 2. The top terminal end 27 of the bobbin is provided with a flange 28 which, in the form illustrated, is reduced in diameter as compared to the flange 24. The flange 28 is suitably secured to the end of the pirn by means of the fastening screws 29. As shown in FIG. 5, the spool is also provided with a longitudinal bore 30 terminating in the bearing portion 31, similar to that described for FIG. 1.

It has been found desirable to reduce the diameter of the flange 23 in those instances where conventional flyers are employed to avoid rubbing contact therewith. However, there has been developed recently a flyer having shoulder sections from which the depending fiyer arms extend permitting the use of an enlarged flange substantially similar in diameter to the flange 24-. However, different diameter flanges may be utilized depending upon the type and configuration of the fiyer which come. within the inventive concept of this invention. By modifying the clutch arrangement and the presser foot on the flyer, yarn may be wound closer to the inside faces of the flanges.

A modification of this inventive concept is illustrated in FIG. 6 wherein the bobbin-33 has a barrel 3d sufliciently turned-down to provide a shoulder 35 on the enlarged driving head portion 36 in which there are circumferentially spaced radially extending recesses 37 in the end thereof. A flange 38 of flbreboard is slidably introduced over the barrel and securely fastened by suitable adhesive means 39, or other suitable means, to the shoulder and barrel. In some instances, a circumferential locking ring 40, partially recessed in the barrel, may be positioned contiguous to the inside face 41 of the tiange 38 to retain the flange in a locked position. A cylindrical sleeve or tube 42, either spiral or convolute wound, preferably of paperboard that is chemically treated and provided with a plastic or lacquer coating, envelops the barrel throughout the longitudinal length thereof and is securely lodged against the flange 41 to preclude axial movement of the sleeve relative to the barrel. A suitable sleeve thickness is approximately inch but this may vary depending upon the material employed. The inner surface of the sleeve may be adhesively secured to the barrel. Positive means for limiting-axial displacement of the sleeve 42 is provided by means of the flange 43 that is securely fastened by the screws 44 to the end of the barrel. The flange 43 will tend to compress the sleeve 42 against the flange 38.

It has been found desirable to apply an adhesive material to the barrel just prior to sliding the sleeve over the barrel thereby limiting relative rotation of the sleeve despite a snug fit. Also, it has been found desirable to apply a fillet of suitable adhesive 45 between the flange face and the sleeve to further limit any possibility of the flange tilting or becoming loose. In some instances, it has been found desirable to omit the locking ring 40 as the paperboard sleeve securely retains the flange 38 in position.

Many modifications and variations may be made to the flanges as well as the axial location thereof as well as vthe substitution of other materials all within the inv'entive concept without departing from the spirit of this invention and as contemplated within the appended claim.

:What is claimed is:

."A bobbin comprising an integral wooden cylindrical barrel having at one end thereof an enlarged cylindrical portion forming a shoulder between said portion and the barrel, said barrel having an axial bore therethrough, said enlarged portion having an end face with at least one radially extending recess, a first circular flange mounted on the cylindrical barrel abutting said shoulder, a locking ring recessed in said barrel contiguous to the flange for locking engagement therewith, a paperboard sleeve extending longitudinally and tightly around said barrel, means securing said barrel sleeve to one of said flanges, and a second circular flange fastened to the other end of said barrel to retain the sleeve in position.

References Cited in the file of this patent 

